MP4689AGN-Z

Overview

The MP4689AGN-Z is a high-voltage input buck LED driver IC from Monolithic Power Systems, designed for high-power LED applications. It operates with an input voltage range of 4.5 V to 100 V and delivers a constant output current of 1 A. The device utilizes a buck topology with an integrated high-side MOSFET and supports switching frequencies up to 1 MHz. It features PWM dimming capabilities with frequencies up to 20 kHz and includes protection mechanisms such as short circuit and thermal shutdown. The component is housed in an 8-SOIC package with an exposed pad.

Feature Summary

• Integrated high-side power MOSFET for compact design
• Hysteresis control mode eliminating the need for compensation
• Dedicated PWM dimming input for precise brightness control
• Built-in short circuit and over-temperature protection

Applications

• High-power LED lighting systems
• Automotive exterior and interior illumination
• Industrial general lighting fixtures
• Battery-powered LED drivers

Procurement Notes

Verify the specific suffix Z indicates RoHS compliance and lead-free status against the manufacturer's official documentation. Confirm the package variant matches the required SOIC-8 footprint with exposed pad for thermal management. Ensure the ordering information aligns with the latest datasheet revisions to avoid discrepancies in electrical characteristics or pinout definitions during procurement.

Selection Notes

Select this component for applications requiring wide input voltage ranges up to 100 V without external output capacitors. The fixed 1 A output current suits single-string high-power LED configurations. Consider the 1 MHz switching frequency for minimizing passive component size. Verify that the operating temperature range of -40°C to +125°C meets the environmental requirements of the target application.

Part Context

This part belongs to the MP4689 family of high-voltage LED drivers. It serves as a successor or alternative to the original MP4689, which is noted as not recommended for new designs. The AGN-Z designation specifies the automotive-grade quality level, package type, and environmental compliance within the MPS portfolio.

Replacement Considerations

MP4689AGN-P is listed as a direct substitute by the manufacturer.